Seminars are often about current topics. If you look at his 2015 and 2016 lists they're entirely different papers.

I've been in seminars where they re-read the 'classics' for the Nth time. The professor first offers a benediction for each paper after which the class engages in a Gregorian call and response chant.

In one class, the first response papers savaged a classic and when the professor arrived for class visibly shaken, he suggested perhaps waiting until the next class to give us sometime to think about it.